Chapter 8 Periodic Inspection Mode; Cond Periodic Inspection Mode Setting; Pharmacopoeia Mode - Horiba Scientific DS-72G Instruction Manual

Chapter 8 Periodic Inspection Mode

This chapter explains about the function to periodically check performance of the
instrument and the electrode in COND measurements using.
We recommend that you perform the check once every 3 months. Setting conditions are
described individually in each COND measurement item.

8.1 COND Periodic Inspection Mode Setting

There are two modes for the COND periodical check: Pharmacopoeia mode, or Checker
(X-52) mode.

Pharmacopoeia mode

This mode conforms to the Japanese Pharmacopoeia 16th edition.
You can check the cell constant and assess the conformity of the instrument.
Checker (X52) mode
Only the instrument check can be performed using the optional COND checker (X-52).
The Pharmacopoeia mode is based on the corresponding regulations, but not fully
compliant with the regulations. Note that the modes may not follow the regulations if the
regulations are revised or amended.
8.1.1 Pharmacopoeia Mode
You can perform the inspection compliant with the 16th edition of the Japanese
Pharmacopoeia; checking the cell constant (within 5% difference between the actual cell
constant and the value written on the COND electrode), measuring standard solutions 3
times to 5 times to check the error (within 5%) from the standard values and relative
standard deviation (within 2%).
Before the operation, set the cell constant written on the COND electrode referring to
"3.1.1 Automatic Calibration Setting" (P.35).
In this mode, the settings are changed as follows automatically.
Unit: S/cm
Temperature conversion: OFF
Temperature setting: MTC, 20.0C
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