ATI
PQ45P Portable pH System
Part 1 - Introduction
5
O&M Manual
Rev-B (7/15)
Figure 1 - PQ45 Portable Monitor System
1.3
Features
Standard main module is designed to be a fully isolated, battery-powered instrument. An optional
arrangement provides for external power from a 10-16 VDC supply.
Output Hold, Output Simulate, Output Alarm, and Output Delay Functions. All forced changes in
output condition include bumpless transfer to provide gradual return to on-line signal levels and to
avoid system control shocks on both analog outputs.
Two 10-bit, isolated, 0-2.5 VDC analog outputs may be configured to track pH and temperature,
or pH and pH. Both analog outputs can be individually programmed to specific ranges. Optional
plug-in datalogger (removable module) allows the user to gather up to 32,000 total data points on
temperature and pH.
Large, high contrast, custom Super-Twist display provides excellent readability even in low light
conditions. The secondary line of display utilizes 5x7 dot matrix characters for clear message
display. Two of four measured parameters may be on the display simultaneously.
Sensor diagnostics monitor glass breakage, sensor leaks, and RTD condition. Diagnostic
messages provide a clear description of any problem with no confusing error codes to look up.
Messages are also included for diagnosing calibration problems.
Quick and easy two-point and sample calibration methods include auto-buffer recognition from 13
built-in buffer tables. To provide high accuracy, all calibration methods include stability monitors
that check temperature and main parameter stability before accepting data.
Selectable Pt1000 or Pt100 temperature inputs. Systems can also be hard-configured for three-
wire elements. Temperature element can be user calibrated.
