SOL-96.110.051 / 260422
TOPAZ Total Hardness
Product Description
8
2.
Product Description
Application
range
The TOPAZ Total Hardness is a complete monitoring system for the
measurement of total hardness TH in potable water, demineralized
water production and process water.
Measuring
principle
Titration of the coloration formed between hydroxynaphthol blue,
calcium and magnesium at pH 10 with EDTA.
Configurations
The instrument is available in the following configurations:
Measuring ranges:
– TOPAZ Total Hardness LR:
5–50 ppm CaCO
3
– TOPAZ Total Hardness HR:
10–100 ppm CaCO
3
15–300 ppm CaCO
3
30–600 ppm CaCO
3
Available with one, two, four or six measuring channels
(common measuring range)
Signal
outputs
Two signal outputs per measuring channel.
Current loop:
4–20 mA
Relays
Five potential-free contacts per measuring channel with the following
functions:
two thresholds (high/high, low/high or low/low)
sample flow alarm
indication of the active measuring channel
maintenance indication
Maximum load: 1 A/24 V
Alarm relay
One summary alarm for “analyzer failure”.
Maximum load: 1 A/24 V
Digital inputs
One digital input per measuring channel to select the active sample
stream and one digital input to stop measurement.
To use the digital inputs, select control mode 3 (see
).