manufacturer :       Metrohm

model :                   871

annotation :           Dokumente engl .

Technical data

Reference conditions

Environment temperature

+22 °C (± 3 °C)

Oven temperature

+35 °C

Relative humidity

50 - 65 %

Instrument condition

>45 min in service

Adjustment interval

Yearly

Measuring unit

Operating modes

DC, Pulse and Scan

Potential

Range:             -2.00 ...+ 2.00 V

Resolution:       10 mV

Operating modes

DC mode

Range:                         10 pA – 200 µA

Resolution:                   1, 2, 5 Steps

Filter ( avg )                   off, 0.2, 0.5, 1, 2, 5 s

Resolution filter            1, 2, 5 Steps

Noise                            < 2 pA (with a dummy cell

300MOhm//0.5uF, filter OFF,

range 1 nA /V, Ec +800mV and temperature of 35°C)

Pulse mode

Range:                         10 nA – 200 µA

Resolution:                   1, 2, 5 Steps

Filter                             off, 0.2, 0.5, 1, 2, 5 s

Resolution filter           1, 2, 5 Steps

Puls intervals               t1: 0.1 ... 2.0 s

t2: 0 (off) ... 2.0 s

t3: 0 (off) ... 2.0 s

Resolution                    10 ms

Meas. intervals           20 ms .. ( t1-60ms )

Scan

Range:                         10 nA – 200 µA

Resolution:                   1, 2, 5 Steps

Scan rate.:                   1 ... 50 mV/s

Resolution:                   1, 2, 5 Steps

Cycle:                           half, full, continuous

Autozero

Function

Compensation of actual cell current.

Maximum compensation

Range:                         Compensation:

10 pA - 1 nA:                25 nA

2 nA - 5 nA:                  250 nA

10 nA - 50 nA:             2.5 µA

100 nA - 2 µA:             25 µA

5 µA - 200 µA:             2.5 mA

Initiation           Externally (RS232), I/O

Injection valve

Positions

Fill .... Inject

Material

Peek

Port connections

10-32 male threaded fittings

Max. pressure

41 MPa

Oven

Temperature range

8 °C above ambient to 45 °C

Accuracy

0.5 °C

Stability

0.1 °C

Mains connection

Voltage

100 - 240 VAC auto-sensing

Frequency

50...60 Hz

Power consumption

260 VA, max.

Fuse

5 mm Ø, 20 mm length

100...240VAC: 2.5 AT/250V (slow-blow)

RS 232 Interface

Connector

Dsub 9 pin (female)

Default settings

38400 Baud, 8 Bit, 1 Stoppbit , no parity

Data acquisition rate

1, 2, 5 or 10 Hz

I/O lines

Connector

2 x Dsub-15 pin, male (A and B) and 1 x phone

jack 2.5 mm, mono (RS 232)

Type lines

TTL, default status 'high" (5V)

Relais, max. 28V(DC), 500 mA

Output lines

Connection A, sensor board

Relais :                         'RELAY 1" and 'RELAY 2'

TTL Input:                    'CELL ON', 'RESET', 'CELL OFF', 'START" and 'AUTOZERO'

TTL Output:                'OVERLOAD', 'AUX1', und 'AUX2'

Signal output

Analog output signal

Rang

-10 V ... +10

or -1V ... +1 V

Resolution

20-Bit DA converter

Offset

-50 % ... +50 % from max. output voltage

Resolution

5 % steps

Safety specifications

Construction / testing

According to EN 61010- 1 , UL 61010A-1, CSA‑C22.2 No. 61010-1, protection degree IP20, protection class 1

Safety directions

The Instructions for Use include information and warnings to which the user must pay attention in order to assure safe operation of the instrument.

Electromagnetic compatibility (EMC)

Emission

Standards met:

EN 61326, EN55011 (class B), EN61000-3-2, EN61000-3-3

Immunity

Standards met:

EN 61326, EN61000-4-2, EN61000-4-3, ENV 50204, EN61000 0-4-4, EN61000-4-5, EN61000-4­ 6, EN 61000-4-8, EN61000-4-11

Ambient temperature

Nominal operating range

+10...+40°C (at 20...80 % atmospheric humidity)

Storage, transport

–20...+50°C (at 0...90 % atmospheric humidity , non­condensing )

Housing

Material of cover

Polyurethane rigid foam (PUR) with fire protection for fire class UL94VO, CFC-free

Material of base

Steel, enamelled

Width                260 mm

Height             381 mm

Depth               355 mm

Weight             11 kg (without accessories)