EUTECH INSTRUMENTS ALPHA COND 500 - REV 4 Especificaciones Pagina 30
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Transmitter Cond/Res 2-Channel M300 30
© 05/07 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Cond/Res 2-Channel M300
Printed in Switzerland 52 121 318
8.2.3 Temperature Compensation
(for Mettler Toledo Thornton M300 only)
Press [ENTER] to select this Menu. The temperature compensation mode for any of the four
measurement lines can be selected. Temperature compensation should be matched to the
characteristics of the application. Choices are ‘None’, ‘Standard’, ‘Light 84’, ‘Std 75ºC’, ‘Linear’,
‘Glycol.5’, ‘Glycol1’, ‘Cation’, ‘Alcohol’, and ‘Ammonia’. Press [ENTER] and save changes.
Standard compensation includes compensation for non-linear high purity effects as well as
conventional neutral salt impurities and conforms to ASTM standards D1125 and D5391.
Std 75°C compensation is the Standard compensation algorithm referenced to 75°C. This
compensation may be preferred when measuring Ultrapure Water at an elevated temperature.
(Resistivity of ultrapure water compensated to 75°C is 2.4818 Mohm-cm.)
Linear compensation adjusts the reading by a factor expressed as a “% per °C” (deviation from
25°C). Use only if the sample has a well-characterized linear temperature coefficient. The factory
default setting is 2.0%/°C.
Glycol.5 compensation matches the temperature characteristics of 50% ethylene glycol in water.
Compensated measurements using this solution may go above 18 Mohm-cm.
Glycol1 compensation matches the temperature characteristics of 100% ethylene glycol.
Compensated measurements may go well above 18 Mohm-cm.
Cation compensation is used in power industry applications measuring the sample after a cation
exchanger. It takes into account the effects of temperature on the dissociation of pure water in the
presence of acids.
Alcohol compensation provides for the temperature characteristics of a 75% solution of isopro-
pyl alcohol in pure water. Compensated measurements using this solution may go above 18
Mohm-cm.
Light 84 compensation matches the high purity water research results of Dr. T.S. Light published
in 1984. Use only if your institution has standardized on that work.
Ammonia compensation is used in power industry applications for specific conductivity
measured on samples using ammonia and/or ETA (ethanolamine) water treatment. It takes
into account the effects of temperature on the dissociation of pure water in the presence of
these bases.
- Operation Manual 1
- Conductivity/Resisitivity 1
- 2-Channel 1
- Transmitter M300 1
- 1 Introduction 7
- 2 Safety instructions 7
- 3 Unit overview 9
- 3.3 Control/Navigation Keys 11
- 3.3.6 “Save changes” dialog 13
- 3.3.7 Security Passwords 13
- 3.4 Display 13
- 4 Installation instruction 14
- 2 Terminal for sensor 19
- 4.3 Connector PIN definition 20
- 6 Quick Setup 21
- 6.3 Measurement Units 22
- 6.4 Analog Outputs 22
- 6.5 Setpoint 23
- 7 Sensor Calibration 24
- 7.5 Sensor Verification 27
- 8 Configuration 28
- 8.2.1 Channel Setup 29
- 8.2.2 Temperature Source 29
- 8.2.4 Set Averaging 31
- 8.3 Analog Outputs 31
- 8.4 Setpoints 33
- 8.5 Alarm/Clean 36
- 8.5.1 Alarm 36
- 8.5.2 Clean 37
- 8.6 Display 37
- 8.6.1 Measurement 37
- 8.6.2 Resolution 38
- 8.6.3 Backlight 38
- 8.6.4 Name 38
- 8.7 Hold Analog Outputs 39
- 9 System 40
- 9.3 Passwords 41
- 9.3.1 Changing Passwords 41
- 9.4 Set/Clear Lockout 41
- 9.5 Reset 42
- 9.5.1 Reset System 42
- 10 PID Setup 43
- 10.1 Enter PID Setup 44
- 10.2 PID Auto/Manual 44
- 10.3 Mode 45
- 10.3.1 PID Mode 45
- 10.4 Tune Parameters 45
- 10.4.3 Proportional Limits 46
- 10.4.4 Corner Points 46
- 10.5 PID Operation 46
- 11 Service 47
- 11.1.2 Digital Input 48
- 11.1.3 Display 48
- 11.1.4 Keypad 48
- 11.1.5 Memory 49
- 11.1.6 Set Relay 49
- 11.1.7 Read Relays 49
- 11.1.8 Set Analog Outputs 50
- 11.1.9 Read Analog Outputs 50
- 11.2 Calibrate 51
- 11.2.1 Calibrate Meter 51
- 11.2.2 Calibrate Analog 53
- 11.2.3 Calibrate Unlock 54
- 11.3 Tech Service 54
- 12 Info 55
- 12.2 Calibration Data 56
- 12.3 Model/Software Revision 56
- 13 Maintenance 57
- 14 Troubleshooting 57
- 14.1 Changing the Fuse 58
- 16 Specifications 59
- 17 Default tables 61
- 18 Waranty 62
- 19 UL Statement (Pending) 62
- Addresses 64
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