USER'S MANUAL

1.0 GENERAL POINTS The instruments of the family "MPT91" represent a series of " Single Loop" microprocessor temperature regulators in the standard 48x48 dimensions (96 mm. depth.) The complete version of the MPT91 instrument has the following technical characteristics: 1- Input from Thermoresistance PT100 ( scale -40.0 ÷ 200.0°C or -40 ÷ 800°C), or from thermocoupling Fe/CO (0÷600°C) and Cr/Al (0÷1200°C) and Pt-Pt/Rh (0 ÷ 1710°C), or from voltage ( 0÷ 10 V ) and current (0/4 ÷ 20 mA) selectable from the keyboard. 2Two display to see Set-Point and Process Value and 4 keys for an easy programmability....

MPT91 M1 proportional band: 0 ÷ F.S. °C/°F integrative time: 0 ÷ 6000 sec. derivative time: 0 ÷ 600 sec cutback const.: 0 ÷ F.S. °C/°F of min. or max in the range: 0 ÷ F.S. °C/°F Alarms relay contact 220V /5A Main Outputs relay contact 220V /5A Alarm output Power supply 90 ÷ 260 Vac/Vdc 20÷30Vac/Vdc Analogue outputs 0 ÷ 10 V – 0 ÷ 20 mA – 4 ÷ 20 mA Max load for current 300 Ω output Min load for voltage 1 KΩ output 10 V Max voltage given 20 mA Max current given 12 bits Resolution 1.2 DISPLAY MESSAGES The following table shows a summary of all the messages that the instrument can show on the display....

MPT91 M1 1.3 MPT INSTRUMENT CONNECTION OVERVIEW DESCRIPTION OF THE FRONT COMMANDS PV-Upper Display: temperature as read by sensor SP-Lower Display: set-point (power percentage on manual control) Led AL: alarm status indication or cooling action or servomotor control drive (if requested ) Led R: ramp function indication Led ON: load control indication : access to the programming functions : increase set-point. Used for programming function : decrease set-point. Used for programming function : enter the enable Ramp programs (disabled of the menu) : START/STOP functions. Only ramp functions (disabled...

MPT91 M1 DESCRIPTION OF THE TERMINAL BOARD inputs for sensor transducer power supply ( see configurations ) analogue outputs (OAP option) or serial output (if requested) enable second set-point (if RSP option is requested) instrument power supply. Between terminals 7 and 8 power from 90V to 260V , or from 10V to 30V if requested. Terminals 9, 10: contact NO of main relay ( A option ) or static output (C option) or alarm 2 conctat (OAP option) and analogue output control. Terminals 11, 12: contact NO of alarm relay (if requested: 03 option) For thermoresistance connection pay attention to the...

VOLTAGE OR CURRENT INPUT CONNECTIONS CURRENT/VOLTAGE INPUT CONNECTIONS WITH TRANSDUCER POWER SUPPLY This connection can be used if the transducer power supply is configured ( see TERMINAL 3 CONFIGURATION). STATIC OUTPUTS CONNECTIONS V+ Be careful: this output is not isolated and may be used for an external solid state relay with double isolation between instrument and power line. RELAY CONNECTIONS Nc 11 10 I=5Amax 9 load ALARM CONCTACT (not available with “F” option) ME4018_11 10/11

SERVOMOTOR CONNECTIONS valve closing valve supply valve opening TERMINAL 3 CONFIGURATION ( TRANSDUCER POWER SUPPLY ) Open the instrument and set the jumper JP2 for a PT100 input (standard) or for a transducer power supply connection. SERIAL OUTPUTS AND ANALOGUE OUTPUTS CONNECTIONS

2.0 INSTALLATION NOTES 1. Copy the connection schemes on pages 6, 7 and 8 taking into account the following points: a- the instrument can operate with analogue inputs or temperature sensors of both thermoresistance and thermocoupling types. Only one of this sensors can be connected (attach the connection only for the chosen sensor, leaving free the other connections.). b- the connector diagram shows all the possible options that the instrument may have; if certain options are not required then the relative connections are not necessary. 2. Follow the instructions of the paragraph: 2.1: for heating...

2.1.1 DIAGRAM MENU WITH HEATING OR COOLING CONTROL I 3 = number relevant to used table Search for the item to change, shown in the upper display using key The value to change is shown on the lower display. If you must change a number, use the key to increment the blinking digit, and thel_key to shift the blinking digit, and if you must select an item, use the To exit the menu, press the modified parameters will be stored.

if requested analogue outputs tCOn = In for heating control tCOn = dIr for cooling control if requested serial outputs

MPT91 M1 Table 3 ref. touch appears on appears on NOTES See key PV display SP display page enter PASS 0 000 In this phase the instrument asks for Pp 1 the Password in order to save the data 64 already programmed. The number memorized by the factory is 0, but any number between 0 and 9999 can be memorized by writing where CPAS appears (next displayed item). PASS 0 0 00 Set Up Procedure. 2 SP-4 To digit the desired number touch the key " SP-4" to move the flashing number to the right. PASS 0 1 00 3 SP+5 Touch the key " SP+5" to increase the flashing number enter CPAS 0 000 Number of the access...

MPT91 M1 ref. touch appears on appears on key PV display SP display 8 NOTES "enter" Set the requested reading with the beginning of the analogue input. To digit the number see 2 and 3 paragraphs. Set the requested reading with the full scale of the analogue input. To digit the number see 2 and 3 paragraphs. Choose rISC for heating regulation with the main relay. Set the requested regulation by “SP+5” and confirm with “enter“. Lower limit set-point. To digit the number follow the procedure described in points 2 and 3 Upper limit set-point. To digit the number follow the procedure described in...

MPT91 M1 ref. touch appears on appears on key PV display SP display Ramp/ Exit NOTES enabled after the first time the temperature reaches the alarm value To change this item use the “SP+5“ key and confirm by “enter” Alarm value set up (if requested). To digit the value see steps 2 and 3. An alarm can work as minimum alarm (if < set-point) or maximum alarm (if > set-point). Alarm 1 hysteresis set up Possibility of inverting the relay function nA = normally open nC = normally closed Set the requested regulation by “SP+5” and confirm with “enter“. If analogue outputs are requested touch the key...