Kern PFB 2000-2 compact laboratory balance 2,000 g / 0.01 g

Product information "Kern PFB 2000-2 compact laboratory balance 2,000 g / 0.01 g"

The Kern PFB is a compact laboratory balance with a strain gauge weighing system, a stainless steel weighing plate and a checkweighing function. Ten models cover weighing ranges from 120 g to 6,000 g. Four models read to 0.001 g (PFB 120-3, 200-3, 300-3 and 600-3), five to 0.01 g (PFB 600-2, 1200-2, 2000-2, 3000-2 and 6000-2) and one to 0.1 g (PFB 6000-1). All models feature a backlit LCD with 21 mm high digits, a standard RS-232 interface and a capacity display.

Ten models in three readability levels

The models with a readability of 0.001 g weigh up to 120 g, 200 g, 300 g and 600 g. They feature a round weighing pan with a diameter of 80 mm (up to 300 g) or 120 mm (PFB 600-3) and a removable draught shield. For the models with a readability of 0.01 g, the weighing range increases from 600 g via 1,200 g, 2,000 g and 3,000 g up to 6,000 g. Up to 3,000 g, a draught shield is part of the equipment as well; the weighing pan measures Ø 120 mm. The PFB 6000-2 and the PFB 6000-1 have a rectangular weighing pan of 190 x 180 mm and no draught shield. The PFB 6000-1 is the only model that reads to 0.1 g.

The PFB 600-3 and the PFB 6000-2 have the greatest resolution in the series at 600,000. Their stabilisation time is 6 s, whilst that of all other models is 2 s.

Checkweighing, hold function and capacity display

When weighing with a tolerance range (checkweighing), a visual and an audible signal indicate whether a value is within the range. Kern names portioning, dosing and sorting for this. Under unsettled weighing conditions, the hold function forms an average value and thus delivers a stable value. An ascending bar graph display shows how much of the weighing range is still available. All main functions have their own button on the control panel.

Counting, percentage determination and formulations

The balances count pieces with the reference piece counts 5, 10, 20 and 50 or with a freely entered reference. The minimum unit weight for piece counting ranges from 2 mg to 200 mg under laboratory conditions, depending on the model (model table). Further functions are percentage determination, the formulation function Net-Total, a totalising memory, a statistics function and the PRE-TARE function, which subtracts the known weight of a container in advance. The units are switchable, including kg, g, lb, oz and ct. The KCP (KERN Communication Protocol) command set is available for connection to computers and control systems.

Adjustment

All models are adjusted using an external weight. Kern specifies a recommended adjustment weight for each model, along with its accuracy class and three possible adjustment points (model table). This does not replace a calibration certificate, which is available separately (see below). A spirit level and adjustable feet are part of the equipment. According to the data sheet, the load cell has degree of protection IP65; the display has no IP protection.

Power supply, rechargeable battery and Bluetooth

The balance runs on a plug-in mains adaptor for 100 V to 240 V and 50/60 Hz; country adaptors for EU, UK, US and CH are included. A rechargeable battery (EWJ-A06) can be ordered ex works. According to the data sheet, it lasts 72 h with the backlight off and 36 h with the backlight on and charges in 6.5 h. In battery operation, automatic switch-off after 30 s, 1, 2, 5, 30 or 60 min can be selected. A Bluetooth interface (PFB-A10, Bluetooth 2.0 and 4.0) is also available only ex works; according to Kern, it cannot be retrofitted.

Typical applications

Laboratory applications: weighing and sample preparation; for models with 0.001 g readability, down to the milligram range
Industrial applications: weighing larger quantities up to 6,000 g with a weighing pan of 190 x 180 mm
Quality control: weighing with tolerance range with visual and audible signal
Formulations: totalling weighings with Net-Total
Portioning, dosing and sorting with checkweighing

If you need to weigh quantities under 1 g to the nearest milligram, choose one of the models with 0.001 g readability. For quantities from a few hundred grams to 3,000 g, a readability of 0.01 g is sufficient, and the PFB 6000-1 is suitable when containers up to 6 kg are weighed to 0.1 g.

Models at a glance

Model	Weighing range (Max)	Readability (d)	Reproducibility	Linearity	Stabilisation time	Weighing pan	Draught shield
PFB 120-3	120 g	0.001 g	0.002 g	± 0.003 g	2 s	Ø 80 mm	yes, removable
PFB 200-3	200 g	0.001 g	0.002 g	± 0.004 g	2 s	Ø 80 mm	yes, removable
PFB 300-3	300 g	0.001 g	0.003 g	± 0.005 g	2 s	Ø 80 mm	yes, removable
PFB 600-3	600 g	0.001 g	0.005 g	± 0.005 g	6 s	Ø 120 mm	yes, removable
PFB 600-2	600 g	0.01 g	0.01 g	± 0.02 g	2 s	Ø 120 mm	yes, removable
PFB 1200-2	1,200 g	0.01 g	0.02 g	± 0.03 g	2 s	Ø 120 mm	yes, removable
PFB 2000-2	2,000 g	0.01 g	0.02 g	± 0.04 g	2 s	Ø 120 mm	yes, removable
PFB 3000-2	3,000 g	0.01 g	0.03 g	± 0.05 g	2 s	Ø 120 mm	yes, removable
PFB 6000-2	6,000 g	0.01 g	0.05 g	± 0.07 g	6 s	190 x 180 mm	no
PFB 6000-1	6,000 g	0.1 g	0.1 g	± 0.2 g	2 s	190 x 180 mm	no

Counting and adjustment by model

Model	Resolution	Counting resolution (laboratory)	Minimum unit weight (laboratory / normal)	USP minimum sample weight (k = 2, U = 0.1 %)	Recommended adjustment weight	Possible adjustment points
PFB 120-3	120,000	60,000	2 mg / 20 mg	4 g	100 g (F1)	40 g; 80 g; 120 g
PFB 200-3	200,000	100,000	2 mg / 20 mg	4 g	200 g (F1)	50 g; 100 g; 200 g
PFB 300-3	300,000	150,000	2 mg / 20 mg	6 g	300 g (F1)	100 g; 200 g; 300 g
PFB 600-3	600,000	300,000	2 mg / 20 mg	10 g	600 g (E2)	200 g; 400 g; 600 g
PFB 600-2	60,000	30,000	20 mg / 200 mg	20 g	600 g (F2)	200 g; 400 g; 600 g
PFB 1200-2	120,000	60,000	20 mg / 200 mg	40 g	1 kg (F1)	400 g; 800 g; 1.2 kg
PFB 2000-2	200,000	100,000	20 mg / 200 mg	40 g	2 kg (F1)	500 g; 1 kg; 2 kg
PFB 3000-2	300,000	150,000	20 mg / 200 mg	60 g	3 kg (F1)	1 kg; 2 kg; 3 kg
PFB 6000-2	600,000	300,000	20 mg / 200 mg	100 g	6 kg (E2)	2 kg; 4 kg; 6 kg
PFB 6000-1	60,000	30,000	200 mg / 2 g	200 g	6 kg (F2)	2 kg; 4 kg; 6 kg

Technical details

These values apply to all models. Deviating values are given in the model tables.

Weighing system	Strain gauge
Weighing plate	Stainless steel
Load cell	Aluminium, degree of protection IP65 (display without IP protection)
Housing	Plastic, 210 x 315 x 90 mm; with draught shield 210 x 315 x 160 mm
Draught shield	Glass, removable, weighing chamber 140 x 150 x 65 mm (external dimensions 147 x 163 x 80 mm); not for the PFB 6000-1 and PFB 6000-2
Display	LCD, backlit, digit height 21 mm; operated via 7 buttons
Units	kg, g, lb, oz, ct and others, switchable
Reference piece counts	5, 10, 20, 50 or free entry
Interfaces	RS-232 as standard; Bluetooth 2.0 and 4.0 (PFB-A10) optional ex works; KCP command set
Power supply	Plug-in mains adaptor, 100 V to 240 V, 50/60 Hz, output 12 V, 500 mA; country adaptors EU, UK, US, CH in the scope of delivery
Rechargeable battery (optional ex works)	EWJ-A06, Li-ion, operating time 72 h without and 36 h with backlight, charging time 6.5 h
Warm-up time (according to the operating instructions)	2 h; 4 h for the PFB 600-3 and PFB 6000-2
Ambient temperature	15 °C to 30 °C
Humidity	0 % to 80 %
Storage temperature	-20 °C to +60 °C
DAkkS calibration certificate	can be ordered separately: item no. 963-127 (PFB 120-3, 200-3, 300-3, 600-2, 1200-2, 2000-2, 3000-2), 963-103 (PFB 600-3), 963-104 (PFB 6000-2), 963-128 (PFB 6000-1)
Warranty (manufacturer)	24 months according to Kern, excluding wear parts

Scope of delivery

Kern PFB compact laboratory balance with stainless steel weighing plate
Removable draught shield (not with the PFB 6000-1 and PFB 6000-2)
Plug-in mains adaptor with country adaptors for EU, UK, US and CH

The rechargeable battery and Bluetooth interface are not included in the scope of delivery; they are only available ex works.

Calibration

A DAkkS calibration certificate can be ordered separately. The item number depends on the model and is given in the table of technical details. The confirmation of manufacturer specification (969-517) is only available in conjunction with the DAkkS calibration certificate. Kern does not specify a conformity assessment under the NAWI Directive (2014/31/EU) for the PFB.

Warranty

According to Kern & Sohn, these devices come with a 2-year warranty. Kern grants 3 years on products with a list price of €500 or more and 2 years on products below that and on components; wear parts such as batteries and rechargeable batteries are excluded. Warranty repairs are carried out by Kern or by a Kern dealer.

Downloads

Operating instructions Kern PFB (PDF)

Regulatory information

As electrical devices, the balances fall under the ElektroG. The manufacturer Kern & Sohn GmbH is registered under the WEEE registration number DE 80821200. How to return old appliances is described on the page Environment and disposal.

Individual requirements and procurement service

The rechargeable battery (EWJ-A06) and the Bluetooth interface (PFB-A10) are only available ex works. Working protective covers (PFB-A12, PFB-A12S05 with 5 pieces), the plug-in mains adaptor YKA-11 (EU, AUS, UK, US, CH), anti-vibration table (YPS-03), anti-vibration plates (YPS-04, YPS-05), thermal printers (YKC-01, YKH-01), dot-matrix printer (YKG-01), needle printer (YKT-01), RS232 Bluetooth adapter (YKI-02), RS232 Ethernet converters (YKI-10, YKI-11), RS232 WLAN converter (YKI-12), RS232 to USB converter (AFH 13) and the RS-232 interface cable (CFS-A01) are also available. Kern lists the following as test weights: the Safety Sets 315-207-303 (PFB 120-3), 315-208-304 (PFB 200-3, 300-3), 315-309-406 (PFB 600-2, 600-3), 315-211-406 (PFB 1200-2) and 315-312-407 (PFB 2000-2, 3000-2), as well as the individual weights 326-07 (100 g, PFB 120-3), 326-08 (200 g, PFB 200-3), 326-11 (1 kg, PFB 1200-2) and 326-12 (2 kg, PFB 2000-2), all of which are OIML class F1. Enquiries are handled via our procurement service.

Weighing range (Max):	2 kg
Readability (d):	0.01 g
Verifiable:	no
Design:	PFB 2000-2 · 2.000 g