Campbell CS526 Instruction Manual - 5. Overview
CS526 ISFET pH Probe
'Split out digital count value for pH from string input
SplitStr
(pHDigit(),rawstring,"String",2,0)
pHCount
=
pHDigit(2)
NextScan
EndProg
5. Overview
The submersible CS526 is designed to reliably provide accurate pH
measurements over the specified operating temperature range. The pH-
sensitive element is SENTRON’s Ion Sensitive Field Effect Transistor (ISFET)
semi-conductor, which includes a silver / silver chloride – potassium chloride
reference system. This technology is one of the most significant breakthroughs
in pH testing in half a century and is considered one of the most robust pH
testing technologies available today.
The CS526 is suitable for demanding applications in laboratory and field. The
ISFET performs well in solutions with high solids, moderately aggressive
chemicals, and biological materials. Clogging and junction-contaminating
conditions are well tolerated. See Section 11, Maintenance, for cleaning
procedures.
CS526 electronics are embedded in durable PEEK material, which makes up
the sensor body. The absence of a glass electrode eliminates the potential
hazard of broken glass. The ISFET design considerably reduces the number of
acidic or alkaline errors in extreme pH conditions.
6. Specifications
Features:
• Safety — the ISFET with durable PEEK material can be used safely
in applications where broken glass is a hazard to the user.
• Intelligent electronics — the CS526 combines the latest
developments in ISFET pH sensing technology with state-of-the-art
signal processing. This allows for accurate, fast and reliable results.
• Quality — designed and manufactured under stringent quality control
conditions in an ISO 9001 environment. Each sensor is individually
tested to the most demanding testing protocols, and the electronics
comply fully with directives and with EMC standard
IEC61326:2005.
Compatibility:
CR800-series, CR1000, CR3000 dataloggers
Measurement
Range:
1 to 14 pH
Accuracy:
±0.2 pH with 2-point calibration
24
hr
drift:
<0.15 pH (after 15-min soak in pH 7 at 25°C)
3