Ametek JOFRA RTC-156/157 B/C User manual

User manual
JOFRA DLC-155/158/250/700
Copyright 2010 AMETEK Denmark A/S

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Table of contents: Page
1.0 General information ......................4
2.0 Introduction....................................5
3.0 Functionality..................................6
3.1 Functional description..................6
3.2 Connections................................6
3.3 Serial number..............................8
4.0 Operation........................................9
4.1 Operation area............................9
5.0 Maintenance.................................10
5.1 Calibration.................................11
6.0 Technical specifications.............15

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1.0 General information
This manual is only effective for the following
products:
JOFRA DLC-155
JOFRA DLC-158
JOFRA DLC-250
JOFRA DLC-700
The products are manufactured by:
AMETEK Denmark A/S
Gydevang 32-34
3450 Allerød - Denmark
TEL: [phone]
FAX: [phone]

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2.0 Introduction
The JOFRA DLC-155, DLC-158, DLC-250 and DLC-
700 probes are designed for fast and traceable
calibration and temperature measuring with JOFRA
RTC-156/157 B/C, JOFRA RTC-158 B/C, JOFRA
RTC-250 B/C and JOFRA RTC-700 B/C systems
and are ready for use.
Please read this manual carefully before use, to
obtain maximum value of your calibration system.
Warning
 Read this manual before use.
 Do not use in hazardous area.
 Handle carefully.
 Never exceed temperature range

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3.0 Functionality
3.1 Functional description
The probes can be used for temperatures in the
range :
 DLC-155 : -60°C to 155°C / -76°F to 311°F
 DLC-158 : -60°C to 155°C / -76°F to 311°F
 DLC-250 : 0°C to 250°C / 32°F to 482°F
 DLC-700 : 0°C to 700°C / 32°F to 1292°F
The JOFRA DLC-155, DLC-158, DLC-250 and DLC-
700 probes may be supplied with a certificate for a
limited temperature range.
3.2 Connections
The probes are delivered with a connecting cable.
The pin-layout is as follows:
Pin 1 : TC V-
Pin 2 : TC V+
Pin 3 : Memory GND
Pin 4 : Memory I/O

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The figure below is shown from the connector side
of the probe connector.
1
2
3
4

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3.3 Serial number
The serial number is placed on the probe as shown
on the figure below:
Serial number

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4.0 Operation
4.1 Operation area
All the probes are intended for use in areas which
meet the following:
Ambient temperature
range : -20°C to 70°C (-4°F to 158°F)
Humidity : 0% to 90%
Protection class : IP 50
Warning
Do not use in hazardous areas.

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5.0 Maintenance
The probe does not require specific maintenance
before or after use. The user may carry out the
following procedure himself:
 Cleaning the probe : Use alcohol or water
and a soft cloth.
Caution…
 The probe must always be protected
against any mechanical damage.
 The probe must never be exposed to
mechanical shock effects.
 Avoid thermal shock
 Any bending of the probe may cause
permanent damage

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5.1 Calibration
Required equipment:
 DLC-probe to be calibrated.
 RTC-calibrator with DLC-input.
 An insert with correct size holes for the DLC-
probe and the temperature probe.
 For calibrating DLC-155, DLC-158 and DLC-250:
an AMETEK 127587 temperature probe
(recommended) or similar with short measuring
zone is required.
 For calibrating DLC-700: a STS-200 A 970
temperature probe (recommended) or similar is
required.
Procedure:
1. Place the DLC-probe in the insert and connect
the probe to the DLC-input of the calibrator.
2. Go to the “Sensor setup” menu.
3. Set “Use load compensation” to “YES”. If the
reference probe is connected to the “REF” input,
set “Sensor type” to “External” and “SET follows
TRUE” to “No”. If no reference probe is
connected, set “Sensor type” to “Internal”.
4. Enter the DLC-menu.
5. Read the A, B and C-coefficients of the probe
and enter the values in the EXCEL spreadsheet
(127588 DLC-155.XLS, 127884 DLC-158.XLS,
127885 DLC-250.XLS or 127589 DLC-700.XLS).

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The calibration temperatures are:
Sensor DLC-155 DLC-155 DLC-700
Calibrator RTC-156 RTC-157 RTC-700
-30°C/-22°F -45°C/-49°F
33°C/91.4°F
-20°C/-4°F -20°C/-4°F
200
°C/392°F
0°C/32°F
0°C/32°F
350°C/662°F
50°C/122°F
50°C/122°F
500°C/932°F
100°C/212°F
100°C/212°F
660°C/1220°F
*
Recommended
calibration
temperatures
155°C/311°F
155°C/311°F
700°C/1292°F
Lower
measuring point Bottom of insert Bottom of insert Bottom of insert
Upper
measuring point 60 mm / 2.4“ from
bottom
60 mm /
2.4” from
bottom
80 mm / 3.1”
from bottom
Curve fit
warning limit 0.01°C/ 0.018°F 0.01°C / 0.018°F 0.05°C / 0.09°F
*Note : The temperatures must be entered in Celcius.

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Sensor DLC-158 DLC-250
Calibrator RTC-158 RTC-250
-22°C/-72°F
28°C/82°F
-10°C/-4°F
50°C/122°F
0°C/32°F
100°C/212°F
50°C/122°F
150°C/302°F
100°C/212°F
200°C/392°F
*
Recommended
calibration
temperatures
155°C/311°F
250°C/482°F
Lower
measuring point Bottom of insert Bottom of insert
Upper
measuring point 60 mm / 2.4“ from
bottom
60 mm /
2.4” from
bottom
Curve fit
warning limit 0.01°C/ 0.018°F 0.01°C / 0.018°F
*Note : The temperatures must be entered in Celcius.
The following procedure is repeated for each
temperature:
1. Set the SET temperature.
2. Place the reference temperature probe in the
bottom of the insert.
Wait until the temperature have stabilized and the
DLC-reading is 0.00°C. If the DLC-reading
continuously shows a positive value at -30°C
(RTC-156) / -45°C (RTC-157) / -22°C (RTC-158),
increase the SET-temperature in steps of 1°C
until the DLC-reading displays 0.00°C.

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3. Record the temperature of the reference probe in
the excel spreadsheet.
4. Move the reference probe to the upper position
60 mm (RTC-156/157/158/250) or 80 mm (RTC-
700).
5. Wait until the temperature have stabilized and the
DLC-reading is 0.00°C.
6. Record the temperature of the reference probe
and the DLC-probe in the excel spreadsheet.
7. Go to next SET-temperature.
After the last STEP is completed:
8. Check that all values in the calculated curve fit
are less than the values specified in the table. If
this is OK, the new coefficients can be
downloaded using the CON050 software.

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6.0 Technical specifications
Probe specifications – DLC-155:
Sensor type : Differential TC type T
Probe length : 177 mm (6.96 in)
Temperature range : -60°C to 155°C / -76°F to
311°F
Diameter : OD3 mm
Depth : 140 mm (5.51 in)
Media compatibility : AISI316
Connection : Redel plug with build in
memory is standard
Probe specifications – DLC-158:
Sensor type : Differential TC type T
Probe length : 192 mm (7.56 in)
Temperature range : -60°C to 155°C / -76°F to
311°F
Diameter : OD3 mm
Depth : 140 mm (5.51 in)
Media compatibility : AISI316
Connection : Redel plug with build in
memory is standard

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Probe specifications – DLC-250:
Sensor type : Differential TC type T
Probe length : 192 mm (7.56 in)
Temperature range : 0°C to 250°C / 32°F to
482°F
Diameter : OD3 mm
Depth : 140 mm (5.51 in)
Media compatibility : AISI316
Connection : Redel plug with build in
memory is standard
Probe specifications – DLC-700:
Sensor type : Differential TC type N
Probe length : 177 mm (6.96 in)
Temperature range : 0°C to 700°C / 32°F to
1292°F
Diameter : OD4 mm
Depth : 200 mm (7.9 in)
Media compatibility : INCONEL 600
Connection : Redel plug with build in
memory is standard

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Certificate:
If the DLC probes are supplied with a certificate, the
calibration is carried out as recommended below
according to the ITS 90 temperature scale.
The DLC-155/158 probe is as standard calibrated in
the range :
–45°C to 155°C (-49°F to 311°F).
The DLC-250 probe is as standard calibrated in the
range :
28°C to 250°C (82°F to 482°F).
The DLC-700 probe is as standard calibrated in the
range :
33°C to 700°C (91.4°F to 1292°F).