Metrohm 827 pH lab - Manual (Page 35)

5 Configuration
826/827 pH meter, Instructions for Use
27
If no printer is within the range of the infrared interface after switching
on the pH meter or if the printer is switched off respectively, the follow-
ing message is displayed:
no IR connection
Please consider the transmission range of the infrared interface (see
Section 2.2) or switch on the printer respectively. The pH meter has to
be switched off and on again.
date YYYY-MM-DD
time hh:mm:ss
You can set the date and time here. The program will only accept num-
bers which make sense.
temp.sens.: NTC, Pt1000
The 826/827 pH meter supports the use of two different types of tem-
perature measuring techniques: NTC ('Negative Temperature Coeffi-
cient' semiconductor) and Pt1000 (platinum resistance thermometer).
This means that the configuration must be adapted accordingly. If NTC
sensors are used then it is also necessary to enter two sensor characte-
ristics; these can be found in the specification of the sensor:
R (25 °C) 10'000...30'000...100'000
B value 1'000...4'100...9'999
The standard values R (25 °C) = 30'000 Ω and B value = 4'100 K apply
to the use of a Metrohm electrode with NTC sensor (e. g. LL Primatrode
NTC 6.0228.0X0), where the B value refers to 25 °C and 50 °C. B values
of other NTC sensors are frequently based on different reference tem-
peratures (usually 25 °C / 50 °C – 100 °C). When entering your own
sensor characteristics the effect of the second reference temperature
on the measuring accuracy of an NTC sensor is negligible.
power save: off, 5, 15, 30, 60 min
When this time interval has expired after the last operation the pH meter
is switched off automatically.
progr.
This is the version number of the instrument software and cannot be al-
tered. It is included in the report header as part of the device identifica-
tion.