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Laboratory pH Meters, Knick
Laboratory pH Meters

The 765 laboratory pH meter comes with a package of safety functions to make reliable pH measurement easier than ever.
After power-on Fullcheck® automatically tests instrument functions from input socket to log output. With record print-outs of the unit self-test, it is possible (as part of quality management to ISO 9000) to document the serviceability of the unit. Drycheck® monitors electrode impedance and alerts to electrode dry up, glass breakage and defective connections even in standby mode. Sensoface® checks the electrode system and indicates electrode condition by evaluating the electrode's zero point, slope, response time and glass impedance and the calibration interval. Trueline® delivers a calibrated analog recorder signal. Calimatic® automatically recognizes the correct buffer. EMC design protects the instrument from electromagnetic interferences. Model 765 completely fulfills the EMC recommendations issued by NAMUR (German committee for measurement and control standards in chemical industry).
Temperature compensation is either automatic with Pt 100 or Pt 1000 temperature probes or manual, as selected. Via the standard RS 232 interface your data can be immediately processed by a computer. Even direct output to a printer is no problem. The large, bright 14-segment LED display allows simultaneous readout of two measured values, such as pH and temperature.

 

Technical data:

Ext. dimensions (W×H×D):

244 × 95 × 255 mm

Weight:

approx. 2 kg

Case:

glass-reinforced polyamide12,
rust-proof stainless steel cover, IP 54 protection,
prepared for fitting of ZU 6954 stand

Connected load:

230 V~ -15% + 10%, 48 to 62 Hz,
< 10 VA, optional 115 V~ (opt. 363)

Display:

alphanumeric, 2 × 4 digits, 14-segment LED, 13 mm high
characters, 3 status indicators with Sensoface®

Ranges:

pH:

-2,00 to +16,00

mV:

-1999 to +1999

°C:

-50,0 to +150,0

Measurement error:

pH:

< 0,01

mV:

< 0,1% + 0,3 mV

°C:

< 0,3 K

Input resistance:

> 1 × 1012 Ω

Input current:

< 1 × 10-12 A

Temperature coefficient:

< 0,1 digit/K

Temperature compensation:

Pt 100/Pt 1000
automatic selection
manual: -50.0 to +100.0°C

Input:

DIN 19 262

Analog output:

galvanically isolated

Trueline®:

1 mV/mV
100 mV/pH

Interface:

RS 232 without control lines, galvanically isolated, user-defined as printer or computer interface

Printer control:

for ZU 0244 printer or any other standard printer via serial interface, printing at key stroke or via print interval timer 0,1 to 999,9 min.

EMC directive:

89 / 366 / EEC

Standards:

EN 61326 / VDE 0843 Part 20 2002-3


ArticleOrder No.
Laboratory pH meter 76561 60 76500

incl. power cable, excl. electrode, 3-year warranty
Laboratory pH meter type 765 SET61 60 76530

with electrode statistics, SE 100 N pH/Pt 1000 combination electrode, ZU 6954 attachment stand and ZU 6928 buffer set (no further options possible)


Accessories
ArticleOrder No.
Attachment stand ZU 695461 60 96954

for accommodating the immersion stirrer and any 3 probes, for connecting directly to the pH meter / conductivity meter
Immersion stirrer ZU 695561 60 96955

power supplied via ZU 6956 power supply unit
Power supply unit ZU 6956 for immersion stirrers61 60 96956
Interface cable ZU 015261 60 97152

for connecting to a computer
(EMC special cable)
Interface cable ZU 024561 60 97245

for connecting to a printer
(EMC special cable)
Laboratory printer ZU 024461 60 97244
Printing paper ZU 024961 60 97249

for ZU 0244 laboratory printer (5 rolls)
Color ribbon ZU 025061 60 97250

for ZU 0244 laboratory printer (5 pcs)
Measuring probe, pH/Pt 1000 combination electrode SE 100 N61 60 97100

glass with integrated Pt 1000 temp. sensor,
pH 0 to 14, 0 to 80°C
Measuring probe, pH combination electrode SE 103 N61 60 97103

glass without temperature sensor, pH 0 to 14, 0 to 100°C
Pt 1000 temperature probe ZU 695961 60 96959

for temperature measurements with short adjustment time,
stainless steel, -10 to +100°C
Buffer solution NIST (NBS) buffer set ZU 694161 60 96941
Option 36310 60 90363

auxiliary power 115 V AC